Negima, - loved the series hated the ending. heres to hoping Akamatsu Sensei continues it later on xD
Cage of eden - Really feels like the author got bored and gave up..
Mx0 - a shame it got cancelled and got a crappy end cause i was really digging it
Naruto - I know its not over but if sauske and sakura dont die and naruto doesnt get Hinata this is gonna top my list forever <3
Reborn - Really? That wasnt even a gag ending . It wasnt even an ending. -.- it could have easily just been another filler chapter ...
Nurarihyon No Mago - Felt rushed, and he didnt choose tsuara -.-

I thought Harima and Eri were a cute pair from the beginning so I'm glad they ended up together in the end... But the whole ordeal of Karasuma and his mental illness was just absurd to me.

And Usagi Drop? I most defninitely didn't care for that ending...

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I thought the manga had a beautiful parenting theme that served as a breath of fresh air amongst the over-saturation of high school slice of life material and poorly drawn doujinshi. With Rin and Daikichi falling in love it ruined my whole perspective on the manga: What once was a heartwarming story of a difficult family situation that yielded a seemingly natural father-daughter bond between two relatives became something very unfathomable and very hard to relate to very quickly.

Weird...I actually liked the ending for Ichigo 100%. It felt "right" that he wound up with the girl instead of the one everyone expected. If you go through their history, she was the one who did the most for him, supported him, and really stuck her neck out for him. The girl that everyone expected had her moments but her devotion to the main character was nowhere nearly as strong.

As for bad endings, recently I'd say Negima has one of the worst endings. They completely skipped through an entire arc right at the very end. Another extremely awful one was School Rumble which started out as being an amazing manga but they totally butchered it in the last volume.

I loved the ending to Ichigo 100% too.

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I hated Toujou to tell you the truth. She was way too bland for my tastes. Satsuki was alright, but Tsukasa was by far the best of the girls. My problem lies in that I hated Manaka, he was such an indecisive dork, don't think I have ever disliked a main character so much. I'm just glad that Tsukasa ended up happy though, she was super cute.

As for with Negi, I felt betrayed at first too. I was like how can he end the manga like this after such an awesome arc! but then I found out that it was not exactly an ending, that Negi ending was pretty much Akamatsu saying that he needs to put the series on hiatus for an undetermined amount of time. Basically there was a whole bunch of legal crap going down at, I think, Kodansha. Basically, Akamatsu might have lost his exclusive rights to the manga, it's not so odd in America but in Japan the author and not the publisher seems to retain most of the IP rights. So basically since he did not know where this legal crap was going, he figured he should cut the series short and get the hell out of there before they can claim the series as their own. Basically he had to give the manga a crappy ending because he might have had his IP rights compromised if he stuck around.

The only other manga I have read in its entirety in recent years has been Asu no Yoichi. I wouldn't say that it had a bad ending so much as it is bad that it wasn't finished. The manga ended like a canceled TV show, they had many more questions to answer but it looks like no one wants to publish it so it is finished. It's sad because I thought that was a really good manga too :(.

I will have to finish Air Gear, but I am not surprised that had a bad ending. Air Gear had it that each Arc in itself was interesting but the arcs did not fit well together, and then Oh Great started doing this crap where like instead of action 90% of each chapters was like scientific and philosophical exposition. :/

sorry guys but i hated it

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i thought he should have ended up with aya and it really didnt make sense, i agree Tsukasa did do alot for him. But, Aya changed the person who he was and made him go after his dream. also, Tsukasa and his personally didn't match up very well and him and aya loved alot of the same things and were both akward. aya definately stuck her neck out by wasting times with his scripts when she was a novelist though. So by helping manaka become the person he is, i felt she was the one who should have ended up with him. (he wouldnt have asked Tsukasa if he didnt see aya's strawberry underwear, or find her book)

Negima, - loved the series hated the ending. heres to hoping Akamatsu Sensei continues it later on xD
Cage of eden - Really feels like the author got bored and gave up..
Mx0 - a shame it got cancelled and got a crappy end cause i was really digging it
Naruto - I know its not over but if sauske and sakura dont die and naruto doesnt get Hinata this is gonna top my list forever <3
Reborn - Really? That wasnt even a gag ending . It wasnt even an ending. -.- it could have easily just been another filler chapter ...
Nurarihyon No Mago - Felt rushed, and he didnt choose tsuara -.-

XXXholic, hands down probably the most disappointing ending I've ever read. Nothing was tied up, everything that had been hinted at over however long the run was was just tossed aside-- but I think CLAMP must have known the ending wasn't that great, since they rebooted it.

i think the ending of my barbaric girlfriend is really bad that it make me hate that manga. i don't know if everyone had read until the last chapter since most scanlation group only got to chapter 57. i managed to find a thread until chapter 62.

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After they accidentally got switch back to their original body, actually i feel kinda glad since that what akira want all along the series. Yeah, he may be wavering due to his love towards senbongi, the idea of how being girl suit him more, and how everyone think that he is better off to be a girl than a boy. But when momoi pestering him to changed back, he blurt out his real feeling of not wanting to do that after all the difficulty of changing back. But i really pissed off when he finally decided that he want to be in the girl body since he love senbongi so much. What make me mad is that i feel like he choose his love instead of his family. I remember how his parent had said when he finally getting home that although they like the manly akira but that gentle akira really put their mind at ease, or something like that. Sometime i think akira's decision is shaped by people around him, not himself. he is soooo easy to be influenced by other's.

after reading the ending, i search through forums to see what other people think and it turn out many people love it.. haha.. maybe i'm the only one who hate it?

Wolf Guy Ookami no Monshou had a terrible ending. The main female character's life was ruined completely in the most sickening way ever and she went off to live with wild wolves in Alaska. The villain dies in an incredible lackluster way for all that he did and the main character ended up a vegetable. Actually the whole 3rd part of this manga was absolute tripe.

Hitman Reborn was bad. The mangaka essentially mitigated all the development the main character went trhough over the course of the 300+ chapter run and everything goes back to how it was at chapter 1. That was horrible.

Vampire Knight was also bad. The main female has been in this overly melodramatic love triangle with two guys for however long but she always seemed to value one over the other significantly. In the end she has kids from both guys and ends up never choosing between the two to the very end. Stupid main character. Stupidly written manga. The Twilight of manga.